A thermoresponsive film applicable to diverse substrates for controllable sessile droplets motion

Progress in Organic Coatings(2019)

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Abstract
•A PNIPAm film with dramatically switchable wettability from superhydrophilic (5.4 ± 2.4) ° to hydrophobic (139.4 ± 2.3) ° was fabricated.•The PNIPAm film was first successfully prepared on diverse substrates especially nonplanar surfaces.•Controllable contact line motion along on-demand directions was realized by applying temperature gradient on the film.
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Key words
Sessile droplet,Spray-coating,Superhydrophilic-hydrophobic,Temperature gradient,Contact line motion
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